Board Thread:General Discussion/@comment-31398341-20170409101440/@comment-31398341-20170421084255

Summing up all pokemon discussed here

Chesnaught

It is primarily used to check physical attackers, such as Mega Lopunny, Bisharp and Tyranitar. It also has a niche in Bulletproof which makes it immune to BALL and BOMB moves. It can learn Spikes as well. Drain Punch + Leech Seed + Protect is a very nice set against physically offensive matchups.

Quagsire

Well, it is probably Unaware set. When invested, it has a high physical defense enough to beat most physical setup sweepers other than grass types. However, it easily loses to most special attackers due to subpar special bulk. At the end of the day, it is a niche pokemon that specifically used to check physical setup sweepers. Pokemon in B rank provides role appreciated for more teams than Quagsire.

Aegislash

As mentioned above, like other pokemon, it can be checked. Unlike most pokemon, however, it has no real counters. '''By definition, COUNTER means that the pokemon can switch in on with Stealth Rock on field and can beat the pokemon with no fear. '''Not to mention that special or mixed set is viable too.